September 7th, 2008 - Peter-363731 said:
I'm not sure I agree with what has been said regarding Batman's motivation behind letting the Joker live, especially in comparison to Ra's Al Ghul. In the first movie, it was clear that if Ra's Al Ghul were allowed to live, he would continue trying to destroy Gotham. Realizing this, Batman chose to do nothing to hinder Ra's death. Call it a necessary evil. If he could've let Ra's live and still keep the city safe, that is the choice Batman would have made. However, that was not a logical choice, based on his desire to protect the city from crime.
It's different with the Joker, though. The Joker has no shred of decency or morality in him. He is a living definition of anarchy and chaos. Because of this, he fears absolutely nothing, not even death. This is clearly indicated by his maniacal laughter as Batman seems to let him fall to his death. Killing the Joker would have proved nothing, except that the Joker had won in his effort to bring Batman down to his level. The Joker is clearly disappointed by Batman allowing him to live, as it shows that there is a difference between them.